Social EngineeringTechnologyTelecom & MediaInformationPhishingStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)LowContained

Horizon Media

bd_28d7120ce69782f9 · schema v1 · pii pii-v1

Severity

Low

Discovered

Jan 9, 2026

Filed

May 6, 2026

To disclose

17 weeks

Affected

Not disclosed

Linked

7 filings

Confidence

64%

Full breach record for Horizon Media →

Horizon Media disclosed that on January 9, 2026, an unauthorized actor gained access to a limited portion of its systems via a sophisticated social engineering event. The actor copied certain files from file shares. The investigation determined that name and other personal information may have been accessed. Horizon contained the incident, notified federal law enforcement, and is offering 24 months of credit monitoring to affected individuals.

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California clockDiscovered Jan 9, 2026 → Notified May 6, 2026117d ✗ CA 30-day late17 weeks discovery → filing

Incident timeline

discovery → filing · 17 weeks / 117 days

Jan 9, 2026

Begins

Jan 9, 2026

Discovered

May 6, 2026

Filed

vs. sector median

2 wks faster

This filing is one of 7 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (6) · sorted by filing gap

Vermont State AGbd_21c32db152c9109c2026-05-06Verified
Maine State AGbd_33a60a56d229fca92026-05-06Verified
Massachusetts State AGbd_611b6f87032f6dba2026-05-06Candidate
Nebraska State AGbd_681520a53377c51c2026-05-06Verified

Show 2 more filings ↓

Indiana State AGbd_6bb727b2cb7f614b2026-05-06Verified
New Hampshire State AGbd_9b8a4ac6ec45f9a62026-05-06Verified

Name: Horizon Media
norm: horizon media

Name: Horizon Media
norm: horizon media
Industry: TechnologyllmTelecom & Mediallm

Discovered: Jan 9, 2026
Breach occurred: Jan 9, 2026
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 6, 2026
Affected individuals: Not disclosed
Data types: Identity (basic)
Attack vector: Unknown
MITRE ATT&CK: T1566 PhishingT1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notified federal law enforcement
Initial access: phishing_link

During the incident: Immediately began an investigation to ensure the event was contained
Undertook a thorough review of the potentially impacted data files
Notified federal law enforcement and are cooperating with their investigation
Offering access to 24 months of credit monitoring services through Experian at no cost to you
Changes made: Assessing our policies, procedures, and infrastructure
Making improvements to our cybersecurity posture to reduce the chances of an event like this recurring
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 17 weeks(117 days from discovery to filing)
Compliance flags: CA 30-day late · 117d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Jan 9, 2026
→ Notified: May 6, 2026
117d 30 calendar days CA 30-day late

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Jan 9, 2026 → Notified: May 6, 2026	117d	30 calendar days	CA 30-day late

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 7 filings · 7 states

View merged incident ↗

Vermont State AGMay 6 · first

Maine State AGMay 6 · first

Massachusetts State AGMay 6 · first

Nebraska State AGMay 6 · first

Indiana State AGMay 6 · first

New Hampshire State AGMay 6 · first

California State AGMay 6 · first · this page

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://oag.ca.gov/ecrime/databreach/reports/sb24-622892
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 6, 2026
Raw hash: 2514ef1877180156a66d6a8f839e9149e3bfbc6d735ca82a64593da6f468054e

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityHorizon Media

Victim entityHorizon Media

Incidentdiscovered Jan 9, 2026

Stated responseImmediately began an investigation to ensure the event was contained

ComplianceCA 30-day late

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov